Hi everybody!
I've spent the whole afternoon trying to downgrade my new Earfun UBOOM L's firmware to the apparently best sounding 0.4.3 version. When I try to do it with the MultiMedia Product Tool, it fails. I've tried different versions of the program, different PC's, different Windows versions, different firmware versions... I would like to think the speaker is fully charged as they demanded. It's been charging for like two hours but I can't see its battery level anymore: the speaker is bricked and I'm desperate.
This is what the log says:
`2024-06-06 20:31:48 Application Startup...`
`2024-06-06 20:32:17 DEVICE1:101 (2M) (2M) FW_CHECK_FAILED("None" in fwsp.BaseFirmwareOP.WRITE_FILE(fwsp.py, line 1233))`
`2024-06-06 20:32:17 Device 1:101 failed: (2M) FW_CHECK_FAILED, took 8 seconds (45%)`
Thank you guys.
